| 摘要 |
The present invention relates to a printer for printing data on a print medium, of the type comprising a print head (21) mounted for movement relative to a print medium (21), a supply of ink ribbon (25), including a span of ink ribbon (27) which is interposed between the print head and the print medium, means (23, 24) for moving the print head and for simultaneously advancing ink ribbon from the supply into the span as the print head is moved in at least one direction, and control means (20) for directing print data to the print head and controlling movement of the print head. …<??>A printer according to the invention is characterised in that the control means includes means for detecting when the printing density exceeds a predetermined level, and means, responsive to the detection of the predetermined level being exceeded, to move the print head an amount greater than that necessary to position the print head at a succeeding print position so as thereby to cause additional ink ribbon to be advanced from the supply and to avoid superimposing additional print impressions on portions of the ink ribbon where a high density of print impressions has already occurred. |
